Integration of enclosure and core for improved structural integrity of an impedance injection unit

An assembly for an impedance injection unit comprising:

• a frame having a plurality of sheet metal components, comprising clamping plates and a support bar, arranged for integration of enclosure and core of the impedance injection unit, wherein the frame is to retain an upper laminated core in the shape of a rectangular prism, a central laminated core in the shape of a rectangular prism, a C-shaped laminated core, a toroidal secondary winding surrounding the central laminated core and a toroidal primary winding surrounding the toroidal secondary winding;
• and
• insulation materials;
• wherein
• the plurality of sheet metal components have shapes and bending to provide stiffening and construction having light weight and structural strength sufficient to withstand, without mechanical failure, stress related to a fault current flowing in a series connection of the impedance injection unit in a power transmission line, wherein magnitude of the fault current ranges from 25 kA to 170 kA.